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DC Generators

DC Generators
In case of dc machines, mechanical losses are primary function of

Current
Voltage
Speed
None of the listed here

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DC Generators
The armature copper loss in a dc generator is a

Constant loss
Stray loss
None of the listed here
Variable loss

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DC Generators
The size of a dc generator can be reduced by using ______

Iron commutator
Lap winding
Magnetic material of high permeability
High resistance winding material

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DC Generators
The armature winding of a dc machine is ______ winding.

None of the listed here
An open circuit
Partly open circuit and partly closed circuit
A closed circuit

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DC Generators
In a four-pole D.C. machine

All the four poles are south poles
Alternate poles are north and south
All the four poles are north poles
Two north poles follow two south poles

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DC Generators
In a dc generator, armature reaction _____ pole tip.

Weaknes the flux at the leading
Strengthns the flux at the leading
Weaknes the flux at the trailing
None of the listed here

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